My ASW 15 went from standard to experimental shortly after it was
imported (the original owner had water bags installed). When I got it
I had it switched back to standard after removing the ballast system.
It was no big deal. The DAR inspected the glider and the only thing I
can remember that he wanted changed was the fuses needed to be
labeled. I can't even remember why I did it. Possibly lower insurance
cost and no program letter or limitations (some of which were No Night
Flight, No Passengers and No Towing Gliders).